Finding the Fourth Proportional to 1,007,091.40, 1,390,079.61 and 658,282.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007,091.40 : 1,390,079.61 = 658,282.50 : x
2. Step 2: Convert to fraction form
   1,007,091.40/1,390,079.61 = 658,282.50/x
3. Step 3: Cross multiply
   1,007,091.40x = 1,390,079.61 × 658,282.50
4. Step 4: Simplify right side
   1,007,091.40x = 915,065,080,869.83
5. Step 5: Solve for x
   x = 915,065,080,869.83/1,007,091.40
6. Step 6: Final answer
   x = 908,621.68